The developer of the product is unreachable
JPCERT/CC had tried to reach the developer for a period of time (more than 9 months) however there were no responses from the developer. Therefore the committee reached the conclusion that it is reasonable and appropriate to judge the developer is unreachable.

- No response to 5 separate emails (sent from April 12, 2011 to November 6, 2011)
- No response to disclosure of the developer’s name (listed on September 29, 2011) and product name and its version (listed on December 16, 2011) in “List of unreachable developers” page on JVN.
- No response to Announcement of screening procedure for vulnerability disclosure (sent on April 28, 2015)

Existence of vulnerability has been verified
It was verified that the product contains a cross-site scripting vulnerability by IPA. Arbitrary script execution on the user’s web browser was confirmed which violates the “Integrity” of the product. For verification details, refer to the “Verification” section.

Not disclosing this case may result in the risk that product users will have no means to know of the existence of the vulnerability in the product
In addition, according to the Terms of Use available on the developer’s website, users are permitted to copy, revise, or distribute the product. Therefore, the developer cannot directly contact all users of this product to notify of the cross-site scripting vulnerability. It was determined that disclosure of this vulnerability is legitimate under these conditions.

There are no particular reasons that would make disclosure inappropriate
After considering the developer’s stance and the risk to product users, the committee has judged that there are no particular reasons that would make disclosure inappropriate or that disclosure may cause any other issues.

Vulnerability Analysis by JPCERT/CC

A vulnerability exploitable with network access means the vulnerable software is bound to the network stack and the attacker does not require local network access or local access. Such a vulnerability is often termed "remotely exploitable".

Access Complexity(AC)

High (H)

Medium (M)

Low (L)

Specialized access conditions or extenuating circumstances do not exist.

Authentication(Au)

Multiple (M)

Single (S)

None (N)

Authentication is not required to exploit the vulnerability.

Confidentiality Impact(C)

None (N)

Partial (P)

Complete (C)

There is no impact to the confidentiality of the system.

Integrity Impact(I)

None (N)

Partial (P)

Complete (C)

Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.

Availability Impact(A)

None (N)

Partial (P)

Complete (C)

There is no impact to the availability of the system.

Base Score:5.0

Verification

Validation Information
The vulnerability was reported to IPA and its existence was confirmed by IPA.